Man, you’re really coming up empty handed for questions to ask aren’t you? lol
Flatulence finds a way. The rectum is not some hermetically sealed chamber, just like your front door, no matter how well it is weather stripped a bit of air still makes it way out, under and around. haha
Personally I love horse farts, here ya go, for a creature that poops 25 pounds of poo a day plenty of farts escape without incident. I was farted on yesterday, deadly accurate, right behind one of the horses when I got zapped. lol
www.youtube.com/watch?v=e39sWSqbh7k